Metal-working machine



R. K. DAVIS AND W. 1. scHAFFEH METALWORKING MA ,0H|NE.

APPLICATION FILED MAR-"9| 1920.

Patented N 0V. A14, 1922.

and R www0/13S l of the invention is to provide means' forl ywith a suitableifchuck 7 having jaws 8 torI carrying a. work piece as. 9. YA.` turret'slidev V Patented Nov. 14, i922.

RUSSELL K. DAvIs ANDWILLIAM J.; scHAIFEnjo' I'Ianaiionn, coimit(rrIcfuiti, f

,'.AssIGNonsTo SKAYEF BALL naninevooivrany, i; GORPQBAT'IONDE CON. y l y v NECTIGUT. f 1V f METALWORIIING:MACHINE .v f

, l `Applicativi; inea?,literair` 9, 1920. serial 'Naeeiea TuoimaZ'Z'wto-mzft mdyconcerni e I.

' Be it known that we, Rossem K. DAVIS and' WILLIAM J. Syorrerrnnyboth `citizens of the United .Statesfresiding at Hart-ford, ini

thecounty oi' Hartford andState of 4Connecticut, have invented certain new and use-` t'ul Improvements in Metal-VVOrking Ma.-I4

chines, of which the followingisa speciii- Iaccompanyingdrawing. M

. This invention relates to-metal working machinery and is peculiarly adapted for use as a'li'Xture torthe turret lathe. An object siredl such arc may-haveits' centerffatfthe? center of thevwork piece whereby-the 'cut willfbe the segment oiga sphere; In a pracl ticable embodiment .of 'the inventionl ther cutter is mounted on the boringbar or pilot` baro theturret and isasso'ci'ated with actu-` ating mechanism Avfor engagement cross feed tool slide. e y E@ .In the .drawings accompanying. this Vspecilication an embodiment of thefinventionis illustrated, in whichdrawings v f' Figure 1 is a top view oi'la turret lather equipped with our improvement,' the work piece being shown vin horizontal section.

Fig. 2 is a top view .of the ixture removed from the lathe, the top plate of the housing being removed.l

Fig.` 3 is an elevation of illustrated in Fig. 2. f p

Fig; 4: is a section taken on a yplane at about theline 4-7-4 of Fig. V@and V y Fig. 5 is a top view of an interchangeable tool holder or carrier removed from the lixture. l

The` form of lathe "illustrated Ais provided 10, having a turret 11 thereon; ismovable toward and trom` kthe yy chuck upon suitable ways, 12. `vThis movement, as is Well knowm: is. automatic, and isV also capable `of being ef` .pfected by means ,ot ,a ,suitable` manually r opcation, reference beinghad k therein r-to the,

of a handv vwheel the structureL erated` as hand 13. `The turrets 1n practicegare jprovided witlnsuitablel barl carrying. members or` socketsas 14. ln thepresent illustrationthe boring barfis` provided with an endif),`

'for insertionin "thessocket and` a pilot end for passing into the chuck-body '7 and therein vengaging ks oinesuita'ble steady resti l V orbushing. l.The lathe is also'shown pro 4 vided with va.well knownxform of tool rest"l slide .llvxwhich `is movable crosswise of the ways `12, suchyf-movement being.effectedy `either automatically froml the 'shaft 18, i which .-is'also utilized to effect the 'autoinatic;v ,4.5K traverseof the current slideulOi-but mayy be movedmanually asI for instance by means' feed` [screw .20..

. The construction 19` acting upon;A the cross.`

.jand yoperation of the mechanism above'described kare well known,

and Hare availed 'ofi for f actuating and controlling the yangularly movable cutter and; effecting' `this by their 'usual andnor'mal `ac-y he operative parts ofour,invention: "1-111'1 'are preferably mounted., upont-the l medianportion ofl the boring or pilotbar `between'fr tions'.

the 'ends 15, 16..,The parts areso constructed; I

organized `and related that the traverse lof] the turret brings'thecutter intoginitialvpo`si.-`

tion for inaugurating its work and 'steadiesfthe tool while ,it is' at work. The tool slide by its cross feed, `actuates'fthe cutter .and causes thistolswing throughthe work at yav predetermined speed upona predetermine'd I radius. y In the vormlof attachment illus;

tratedthe tool21 gis mountedto turn on 1an axis represented'at`22 whichL is perpendicuf lar to the longitudinalaxis, 23, of the boring bar, ksuch 'axis 23l coinciding with; the'l axis of rotation of they chuclr .pThe toolholderl 24 is i shown 1in' the form. of: a; disc lmounted in a housing formed in the centeraportion 0f the boring or pilot bar7 the hc'iusinghav-"` ing ai rectangular vframe vworkfthere being" a .center onbas'ev` plate 25integ1`ral.with?the` y i ends llandl anda removable Stop plate 26;

rllfhese plates form bearingsforethe, variousv parts. The tool holderfis" shown-*provided with hubs27 lwhichare mountedin suitable openingsin the plates 25 and 126;"5 Onef of: the hubs isv shown providedfwith av tapped* hole for .receiving a'set'screw .'28 which frper;

mits ofthe adjustment, infand out,.u ofthe` cutter ortoolx2l.` l'Such adjustment may'be p either for the purpose of compensatingfor wear or chzunggirigthe radius oi the cut.

The tool holder 243: is provided with` gear `teeth 29 which mesh with gearl teeth 30 formed on a somewhatsirnilar wheel or disc,

31 having trunnions 32 also mounted in suitable openings in the plates and 26. The

teeth of a rack bar 33 are shown meshingwith the teeth ofv this gear wheel. A reciprocation. of the `rack eiiects the oscillation of the cutter 2l. The back edge of the rack .barengages a suitably formed 'face at the end of the rectangular housing, and its topy and bottom acesengage the inner sides of the plates 25 and 26. y

The excursion oi2 the rack bar 33, or movement inthe direction of the arrow in 2, causesthe vcutting or working movement 'ot' the tool 21 and is produced by the forward vfeed of the cross slide. The recessional. movement of this rack bar is effected i able. interchangeable 'from one lathe to another,

Asimilar' portion in 2.

iny the present illustration by means of a suitable extension spring 34. -The various-parts of the device and particularly the tool holder 2li are interchange- Of course, the iixture, as a whole, is

and the tool holders are interchangeable tor various reasons particularly thatof increasing` the range of work sizes. As is well known it the working' end ot' the tool 21 eX- tends too' far out of' its socket there will be a vibration or chattering. A considerable rarnpje of tool movement is permissible, but to'admit of adjustment beyond this permissible range there is provided with each 'at- Alurality vot tool holders havingy ,i art ot' the socket forming j'if holderlocated at different radial distances riz-om the axis 22. By reference to Fig. and comparing` this with 2. it will be seen that the portion 35 just referred to extends :t'arther than does the y Sufficient metal will be added with increments of radius.

The operation of' the nature is substantially as follows: The parts are properly assembled in position and the tool properlyv sharpened.l The portion 15 oit the bar is placed and locked in its socket.`the turret .with itsslide occupyingl a withdrawn position, inthe illustration beingrbacked oit toward the right hand side; The work piece 9A is placedin the chuck jaws 8, which bring);`

, withthe feedv device 13 or by'means ofthe hand wheel 13, until the end of the rack bar 33` is; in the path of movement of the tool slide.v The tool'slide is then brought, preferably by the actuation of the hand Wheel, up so that its front end engages'the end of the bar The turretA is then advanced to itsiixed limit which is so regulated that the axis 22 oitgthe-cutteris located inthe plane ofthe work piece 9, which shallconstitute the center of the groove to be cut in the work piece, whereupon the turret slide is heldin position in the well known manner and" the tool -slide is released to the automatic cross reed of the screw 20 and actuating device 18. This automatic cross feed action presses*` the rack bar 33 forward thereby rotating the gear wheell 31, and

through which the disc 24, which in a cer-l tain aspect is a gear wheel, thus swinging the point V,of the cutter 21 through an arc; of a circle andk causing itv to cut or form in thebore ofthe work piece, a groove' which is the arc of a circle incr-oss section, and with the parts as herein illustrated theL segment of a sphere. During the cutting operation, the pilot end 16 of the bar,`having entered the proper bushing' or socket provided for it, steadies thetool.

At times it is desirable to manually oseillate the tool audits tool holder. A convenient means for accomplishing this is shown. The upper trunnion of the gear wheel 31' isextended into a post 35 of angular cross section for receiving a' suitable handle, 36. K

It is to be understood that thejdisclosure inthe description and drawings `is intended to be illustrative of the invention and that changes in details of construction may be resortedto as occasion'demands to meet the requirements of various forms of machine tools with which the lixture will be em-jv ployed, as well as to meetv the requirements l. rIhe combination with a rotary chuck,l

a carrier movable toward andr from the same in a path parallel with the axis ofrota'tion thereof, vand a slide movable transversely thereoh'ot an oscillatory tool holder, a supporting; member carried by thecarrier and upon whichthe toolholder is pivotallv mounted, and a reciproca-tory actuatorassociated with the tool holder' for oscillating;- the same, the parts beingrso organized and located thatthe traverse or the carrier is effective to place the tool'holder into working` relation with. a work piece carried lby the chuck and to place the actuator in they path ofy movement of thev slide.

, 2'. The combination with ar'otarychuck, a carrier movable toward andfrom thesanie in'a pathparallel with the axis of rotation, thereof, and Va slide Vmovable transversely thereof, 'of an oscillatory tool holderk provided with gear teeth, a supporting mem- 1,435,453 p y lg3 ber carried by the carrier and upon Which the tool holder is pivotally mounted, and a reciprocatory rack bar in mesh with the gear teethof the tool holder for oscillating the same, the parts being so organized and located that the traverse of the carrier is effective to place the tool holder into Workingrelation With the Work piece carried Y by the chuck and to place the rack bar in the path of movement `of the slide.

3. The combination With a rotary chuck, a carrier movable toward and from lthe same in a path parallel With the axis of rotation thereof, and a slide movable transversely thereof, of an oscillatory tool holder provided With gear teeth, a supporting member carried by the carrier and upon which the tool holder is pivotally mounted, a reciprocatory rack bar in mesh With the gear teeth of the tool holder for oscillating the same, and an extension spring for returning the rack bar, the parts being so organized and located that the traverse of' the carrier is effective to place the tool holder. into Working relation with a Work piece carried by the chuck and to place the actuator in the path of movement of the slide and the traverse of the slide effects the excursion of the rack bar and extends the spring.

4;. The combination With a rotary chuck, a carrier movable toward and from the same s in a path parallel With the axis of rotation thereof, and a slide movable transversely thereof, of an oscillatory tool holder, a supporting member interchangeably carried by the carrierl and upon which the tool holder is pivotally interchangeably mounted, a reciprocatory actuator associated with the tool holder for oscillating the same, the parts being so organized and located that the traverse of the carrier is effectiveto place the tool holder 'into Working yrelation with a Work piece carried by the chuck and to place the actuator in the path of movement of the slide.

. 5. rIhe combination with a rotary chuck, a turret movable toward and from the same in a path parallel `vvith the axis of rotation thereof, and a cross slide rest movable trans-v versely thereof, of an oscillatory tool holder provided with gear teeth, a boring bar interchangeably carried by the turret and upon which the tool holder is pivotally mounted, ai

reciprocatory rack bar in mesh With the gear teeth of the tool holder for oscillating the same. i

6. In a turret lathe having a chuck, longiassociated With the tool holder for oscillati ing the same, the parts being so organized and located that the traverse of "the turret.v

is effective to brace the tool holder into Working relation With a Work piece carried'by the chuck and to place the actuator in the' path of movement of the cross slide.

'7. The combination of a rotary chuck to hold an annular Work piece with .its bore exposed, a. relatively fixed supporting member, a tool holdermounted on the vsupporting member to oscillate thereon and provided With a tool in position to act on the bore of the Work piece, a tool holder actuator sustained on the supporting member and movable relatively thereto transversely of the axis of rotation of the `Work, said actuator being operatively connected with. the tool holder to oscillate the same, and means for moving, the actuatorrelatively to the supporting member.

8. The combination lWith* an yoscillatory tool holder of a supporting memberin the nature of a boring bar for a turret lathe upon Which the tool holder is pivotally and interchangeably mounted, and a reciprocatory actuator mounted on the supporting member `for oscillating the tool holder.

9. The combination With an oscillatory" tool holder provided with gear teeth, a supportingmember in thenature of a boring bar upon Which the tool holder kisi-pivotally mounted, and areciprocatory rack bar in mesh with the gear teeth of the tool holder i for oscillating the same. 10. The combination with a rotary chuck, of a boring bar having a pilot portion adapted to enter the chuck, van oscillatory tool holder pivotally mounted on the boring bar, lan adjustable stop for locating the tool `holder in Working relation to the chuck, a

reciprocatoryactuator associated With the ,tool holder for oscillating the same, and a member movable toward and from the tool holder .When llocated by the stop' as-aforey said and adapted to actively engage the said actuator. y n

In testimony whereof, We have aflixed our signatures hereto. i v

' f RUssELLK. Davis WILLIAM J. soHAFFERfV f` iio y 

